According to my assumption that keeping Bitcoin can be something good, Bitcoin's charts move much faster,If you are a more technical expert analyst then you can do daily trading...
I think right now there are a lot of shit coins in the market right now so, i think you have play safe. If you still want to trade, it is better to trade in coins like BTC, BCH, LTC and others which have actual good future ahead of them in 2018. Other altcoins might get rekt due to high volatility of Bitcoin and may be worth pennies pretty much in start of 2018. There are also coins, which you can hold for long term, but do a complete research before investing into one.